TWI698613B - High efficiency light-projecting device - Google Patents

Abstract

A high efficiency light-projecting device includes a base, a low-beam module, a high-beam module, a light-distributing lens and an optical module. The low-beam module and the high-beam module are disposed on the base and correspond in position to each other. The light-distributing lens corresponds in position to the low-beam module and the high-beam module. The optical module is disposed between the base and the light-distributing lens. The optical module includes a light-reflecting member adjacent to the base and a light-guiding member distant from the base. The light-reflecting member is opaque and the light-guiding member is transparent, and top surfaces thereof are in proximity to an optical axis of the light-distributing lens. Therefore, a high-efficiency headlight illumination with a smaller device size can be implemented.

Description

High efficiency light projection device

The invention relates to a light projection device, in particular to a high-efficiency light projection device applied to vehicle lamp lighting.

Car lights are equivalent to the eyes of powered vehicles (such as locomotives or automobiles) and are very important for driving safety. Common car light sources include halogen lamps, tungsten halogen lamps and HID lamps (High Intensity Discharge Lamp) and so on. In addition, the light emitting diode (LED) has the advantages of small size, high luminous efficiency, low energy consumption and environmental protection, and the light that it can emit covers visible and invisible light, and the luminous brightness can reach a considerable degree, so The use of light-emitting diodes (LEDs) to replace halogen lamps, tungsten halogen lamps or HID lamps as automotive light sources is becoming more and more common.

For example, Patent No. TW M539600 and Patent No. TW M536321 both disclose a wick device, which can be directly installed on the headlight of a powered vehicle. In the wick device disclosed in Patent No. M539600, an LED light-emitting unit is configured to emit light directly toward the lens to produce a low-beam light type. In addition, an LED light-emitting unit is matched with a reflective structure on the car light to produce outward The projected light then produces a high-beam light pattern, in which the reflective structure has a parabolic-like curved surface. In addition, the wick device disclosed in Patent No. TWM536321 includes two LED light-emitting units (ie, a first LED light-emitting unit and a second LED light-emitting unit) and a reflective structure. The light emitted by the first LED light-emitting unit can be reflected by the structure. It is reflected and projected onto the lens to produce a low beam light type. The light emitted by the second LED light-emitting unit can be reflected by the reflecting structure and projected outward to produce a high beam light type, wherein the reflecting structure has a parabolic-like curved surface. However, the optical design of the above device cannot make full use of the light generated by the LED lighting unit, so that the low beam and high beam There are doubts about insufficient light intensity. Although the light intensity can be increased by increasing the number of LED light-emitting units, this method cannot meet the design requirements of miniaturization.

Refer to Patent No. TW I619624 and Patent No. TW I650512 owned by the applicant in this case. There are also some wick devices that use a driving mechanism to change the position of the light guide structure to switch between the low beam and the high beam. However, due to the use of moving parts, the overall structure of this type of device is relatively complicated, which not only cannot further reduce the volume, but also increases the cost of the device; in addition, the use of moving parts will generate a certain amount of heat, which affects the heat dissipation efficiency of the device.

The technical problem to be solved by the present invention is to provide a high-efficiency light projection device for the shortcomings of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a high-efficiency light projection device, which includes: a base, a first light source module, a second light source module, and a light distribution Lens and an optical module. The first light source module is disposed on the base, wherein the first light source module includes a first light emitting unit and a first reflecting unit for reflecting light emitted by the first light emitting unit; The second light source module is disposed on the base and corresponds to the first light source module, wherein the second light source module includes a second light emitting unit and a second reflecting unit for reflecting the first light source module The light emitted by the two light-emitting units; the position of the light distribution lens corresponds to the first light source module and the second light source module, and has a lens optical axis; the optical module is disposed on the base Between the light distribution lens and the light distribution lens, the light reflected by the first reflection unit and the second reflection unit is directed to the light distribution lens. The optical module includes a first light guide member close to the base and a second light guide member far away from the base, the first light guide member is made of opaque material and the second light guide member The light member is made of light-transmissive material, and an upper surface of the first light guide member and an upper surface of the second light guide member are both located near the optical axis of the lens.

In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present invention Yes, a high-efficiency light projection device is provided, which includes: a base, a circuit substrate, a first light source module, a second light source module, a light distribution lens, and an optical module. The circuit substrate is disposed on the base, and has a first mounting surface and a second mounting surface opposite to the first mounting surface; the first light source module includes a The first light-emitting unit and a first reflecting unit on the mounting surface are used to reflect the light emitted by the first light-emitting unit; the second light source module includes a second light-emitting unit disposed on the second mounting surface Unit and a second reflecting unit for reflecting the light emitted by the second light-emitting unit; the position of the light distribution lens corresponds to the first light source module and the second light source module, and has a lens light Shaft; the optical module is disposed between the base and the light distribution lens, used to make the light reflected by the first reflection unit and the second reflection unit project to the light distribution lens. The optical module includes a first light guide member close to the base and a second light guide member far away from the base, the first light guide member is made of opaque material and the second light guide member The light member is made of light-transmissive material, and an upper surface of the first light guide member and an upper surface of the second light guide member are both located near the optical axis of the lens.

One of the beneficial effects of the present invention is that the high-efficiency light projection device provided by the present invention can be arranged between the base and the light distribution lens through the "optical module, and includes a first light guide near the base And a second light guide member far from the base, wherein the first light guide member is made of opaque material and the second light guide member is made of light transmitting material, and the upper surface of the first light guide member and the second light guide member The technical solution that the upper surface is located near the optical axis of the lens is to make full use of the light source to greatly increase the light intensity while meeting the requirements of miniaturization.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

Z: High efficiency light projection device

1: base

100: bearing surface

11: Positioning structure

110: Bevel

12: Heat dissipation structure

2: The first light source module

21: The first circuit board

211: The first mounting surface

212: second mounting surface

22: The first light-emitting unit

220: First Glossy Surface

221: LED chip

23: The first reflection unit

23a: the first focus

23b: second focus

230: first bottom opening

231: The first optical surface

232: second optical curved surface

233: third optical curved surface

3: The second light source module

31: The second circuit board

311: Central area

312: Surrounding Area

313: board surface

32: The second light-emitting unit

320: Second Glossy Surface

33: second reflection unit

33a: The first focus

33b: Light gathering area

330: second bottom opening

331: first reflective surface

332: Second reflective surface

333: Connection surface

34: Shading parts

340: open

4: Light distribution lens

41: lens optical axis

42: lens focus

5: Optical module

51: The first light guide

51a: Central optical area

51b: Outer optical area

510: upper surface

511: first reflection plane

512: second reflection plane

513: reflective slope

514: Gap

52: second light guide

52a: Central optical area

52b: Outer optical zone

520: upper surface

521: Glossy Surface

522: Glossy Surface

523, 525: the first optical plane

524: Stepped convex structure

5241: The first optical bevel

5242: second optical bevel

5243: second optical plane

526: second optical plane

527: Optical Bevel

53: reflective layer

E: predetermined direction

θ1, θ2, θ3, θ4, θ5: predetermined angle

D1: Horizontal distance

D2, D3: vertical distance

L1, L2, L3, L4, L5: light

L11, L21, L31, L41, L51: once reflected light

L12, L22, L43: secondary reflected light

L42, L52: once refracted light

L53: Double refraction of light

T: straight

FIG. 1 is a schematic diagram of a three-dimensional combination of the high-efficiency light projection device of the present invention.

2 is another three-dimensional assembly diagram of the high-efficiency light projection device of the present invention.

3 is a three-dimensional exploded schematic diagram of the high-efficiency light projection device of the present invention.

4 is another three-dimensional exploded schematic diagram of the high-efficiency light projection device of the present invention.

FIG. 5 is a schematic three-dimensional cross-sectional view of the high-efficiency light projection device of the present invention.

6 is another three-dimensional cross-sectional schematic diagram of the high-efficiency light projection device of the present invention.

FIG. 7 is a schematic plan view of the high-efficiency light projection device of the present invention.

FIG. 8 is a schematic diagram of light projection of the high-efficiency light projection device of the present invention.

FIG. 9 is another schematic diagram of light projection of the high-efficiency light projection device of the present invention.

FIG. 10 is a schematic partial top view of the high-efficiency light projection device of the present invention.

11 shows the relative relationship between the base, the first light source module and the light distribution lens of the high-efficiency light projection device of the present invention.

FIG. 12 is a schematic top view of the high-efficiency light projection device of the present invention.

Fig. 13 is a partial plan view of the high-efficiency light projection device of the present invention.

14 shows the relative relationship between the base, the second light source module and the light distribution lens of the high-efficiency light projection device of the present invention.

15 is a three-dimensional schematic diagram of the second reflection unit of the second light source module of the present invention.

16 is a three-dimensional schematic diagram of the optical module of the high-efficiency light projection device of the present invention.

Fig. 17 is a partial enlarged view of part XVII in Fig. 7.

FIG. 18 shows another embodiment of the optical module shown in FIG. 17.

19 is another three-dimensional schematic diagram of the optical module of the high-efficiency light projection device of the present invention.

20 is another schematic plan view of the high-efficiency light projection device of the present invention.

The following are specific examples to illustrate the implementation of the "high-efficiency light projection device" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as “first”, “second”, and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

1 to 6, the first embodiment of the present invention provides a high-efficiency light projection device Z, which mainly includes: a base 1, a first light source module 2, a second light source module 3, a The light distribution lens 4 and an optical module 5. The high-efficiency light projection device Z of the present invention can be applied to vehicle lighting to provide low-beam and high-beam light types that comply with the ECE regulation, but the present invention is not limited to this.

The following will first describe the relative relationship of the constituent elements of the base 1, the first light source module 2, the second light source module 3, the light distribution lens 4, and the optical module 5, and then further describe the realization of each constituent element and the present invention. Invented optical design.

The first light source module 2 and the second light source module 3 are both arranged on the base 1 and correspond to each other. The position of the light distribution lens 4 corresponds to the first light source module 2 and the second light source module 3, and the optical module The group 5 is arranged between the base 1 and the light distribution lens 4. In this embodiment, when the first light source module 2 is When the mirror 4 and the optical module 5 cooperate with each other, a low beam light type can be produced; when the second light source module 3, the light distribution lens 4, and the optical module 5 cooperate with each other, a high beam light type can be produced. However, the above-mentioned example is only one of the feasible embodiments and is not intended to limit the present invention.

It is worth noting that, as shown in FIGS. 7-9, the optical module 5 can cause the light projected by the first light source module 2 or the second light source module 3 to reflect, refract, and other optical effects, and pass the light distribution The lens 4 projects outward to produce a low beam light type or a high beam light type. Furthermore, the optical module 5 includes a first light guide 51 close to the base 1 and a second light guide 52 far away from the base 1, wherein the first light guide 51 is made of opaque material and the second light guide The light guide 52 is made of light-transmitting material, and an upper surface 510 of the first light guide 51 and an upper surface 520 of the second light guide 52 are both located near the optical axis of the light distributing lens 4.

Referring to FIG. 3 to FIG. 7, the base 1 serves as the foundation of the entire device, and has a bearing surface 100 and a positioning structure 11 extending from the bearing surface 100. The first light source module 2 includes a first circuit substrate 21, a first light emitting unit 22, and a first reflecting unit 23. The first circuit substrate 21 is disposed on the carrying surface 100, and the first light emitting unit 22 is electrically connected to On the first circuit board 21, the position of the first reflecting unit 23 corresponds to the first light emitting unit 22, and is used to reflect the light emitted by the first light emitting unit 22. The second light source module 3 includes a second circuit substrate 31, a second light emitting unit 32, and a second reflecting unit 33. The second circuit substrate 31 is fixedly connected to the positioning structure 11, and the second light emitting unit 32 is electrically connected to On the second circuit board 31, the position of the second reflecting unit 33 corresponds to the second light-emitting unit 32 and is used to reflect the light emitted by the second light-emitting unit 32. In an embodiment not shown, the base 1 may not include the positioning structure 11, and the second circuit substrate 31 is also disposed on the carrying surface 100, and is offset from the first circuit substrate 21.

In this embodiment, the positioning structure 11 is a positioning bump, and the second circuit substrate 31 has a central area 311 for arranging the second light-emitting unit 32 and at least one peripheral area 312 on one side of the central area 311, wherein at least A peripheral area 312 is fixedly connected to the upper surface (not labeled) of the positioning structure 11, and the central area 311 is exposed from the positioning structure 11. In addition, the first circuit board 21 and the second circuit The substrate 31 is arranged approximately horizontally, and the light-emitting direction of the first light-emitting unit 22 is different from the light-emitting direction of the second light-emitting unit 32 of the second light source module 3; for example, the light-emitting direction of the first light-emitting unit 22 is the same as that of the second light-emitting unit 32. The direction of light emission is opposite. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

Preferably, the base 1 has good heat conduction and heat dissipation capabilities to effectively remove the heat generated by the first light emitting unit 22 and the second light emitting unit 32, thereby improving the reliability of the first light emitting unit 22 and the second light emitting unit 32 Performance and service life. Furthermore, the heat generated by the first light-emitting unit 22 can first be transferred to the base 1 through the first circuit substrate 21, and then quickly escape through the heat dissipation structure 12; the heat generated by the second light-emitting unit 32 can first pass through the first The two circuit boards 31 are transferred to the base 1 and then quickly escape through the heat dissipation structure 12.

In this embodiment, the material of the base 1 may be a metal with high thermal conductivity (such as aluminum), and the base 1 may include a plurality of heat dissipation structures 12; the number, shape, and distribution of the heat dissipation structures 12 may be changed according to heat dissipation requirements. The present invention does not specifically limit it. For example, the plurality of heat dissipation structures 12 of the base 1 may be sheet-shaped and distributed around the first circuit substrate 21 and the second circuit substrate 31 at intervals.

Referring to FIGS. 3 to 7, the first reflecting unit 23 of the first light source module 2 is a reflecting cover and has a reflecting surface. The reflecting surface is a multi-curvature compound curved surface, which is exemplified as an ellipsoidal surface in this embodiment. . The first reflection unit 23 has a first focus 23a and a second focus 23b. The first focus 23a is located within the coverage area of the first reflection unit 23, and the second focus 23b is located outside the coverage area of the first reflection unit 23. It is preferably near the edge of the coverage area. The position of the second focus 23b corresponds to the optical module 5; for example, the second focus 23b is located on the upper surface 520 of the second light guide 52, as shown in FIG. In addition, the light distributing lens 4 has a lens optical axis 41 and a lens focal point 42 located on the lens optical axis 41, and the second focal point 23b of the first reflecting unit 23 may be located on the lens optical axis 41 and coincide with the lens focal point 42; or The second focal point 23b of the first reflecting unit 23 can deviate from the lens optical axis 41 and is located near the lens focal point 42. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

The first light emitting unit 22 of the first light source module 2 can be a light emitting diode (LED) or a light emitting diode package structure (LED package structure); for example, the first light emitting unit 22 is a light emitting diode package structure It also includes a plurality of light emitting diode chips 221, four of which are illustrated in FIG. 3. In addition, the first light emitting unit 22 may be disposed on or near the first focal point 23a of the first reflecting unit 23. The first circuit substrate 21 of the first light source module 2 can be a metal-based printed circuit board (MCPCB), and has a drive control circuit for the first light-emitting unit 22, and the first light-emitting unit 22 can use surface mount technology (SMT ) Mounted on the first circuit board 21. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

Referring to FIG. 10, the plurality of light emitting diode chips 221 of the first light emitting unit 22 may be arranged along a predetermined direction E, and the predetermined direction E and the lens optical axis 41 sandwich a predetermined angle θ1 of 70 to 110 degrees. In this way, the desired light distribution effect can be achieved, for example, the brightness of a specific illumination area can be reduced or enhanced.

Referring to FIG. 11, the first reflecting unit 23 can be slightly inclined upward or horizontally according to the light distribution needs. Furthermore, the first reflection unit 23 has a first bottom opening 230, the connection line between the first focus 23a and the second focus 23b of the first reflection unit 23 is located near the first bottom opening 230, and the first reflection unit 23 The connecting line between the first focal point 23a and the second focal point 23b and the lens optical axis 41 form a predetermined angle θ2 of 0 degrees to 30 degrees, preferably 0 degrees to 7.5 degrees, and more preferably 3.5 degrees to 5 degrees.

Referring to FIG. 12, according to light distribution requirements, the reflective surface of the first reflective unit 23 may include a first optical curved surface 231, a second optical curved surface 232, and a third optical curved surface 233, which are distributed from the inside to the outside. Both the first optical curved surface 231 and the third optical curved surface 233 can provide a light diffusion effect, wherein the area of the first optical curved surface 231 is larger than that of the third optical curved surface 233, so that the light diffusion effect provided by the first optical curved surface 231 is more obvious; The second optical curved surface 232 is connected between the first optical curved surface 231 and the third optical curved surface 233 and can provide a light-concentrating effect. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

Referring to FIGS. 3 to 7, the second light source module 3 is located in the coverage area of the first reflecting unit 23, and the second reflecting unit 33 of the second light source module 3 is a reflecting cover and has a reflecting surface; However, the reflecting surface of the second reflecting unit 33 is a multi-curvature complex curved surface, which can be produced by optical simulation design. In this embodiment, the second reflecting unit 33 can define at least two optical axes (not shown) passing through the vicinity of the light collecting area 33b, and these optical axes pass through the second light emitting unit 32, so that the second reflecting unit The light expansion effect of 33 is better and more obvious to meet the requirements of automobile lamp regulations; it should be noted that these two optical axes can be parallel or non-parallel to each other, or at least one optical axis is parallel to the optical axis of the lens. In other embodiments, the second reflecting unit 33 may have only one optical axis.

The second reflecting unit 33 has a first focal point 33a and can define a light focusing area 33b. The first focal point 33a is located in the coverage area of the second reflecting unit 33 and the light focusing area 33b is located in the coverage area of the second reflecting unit 33 outer. The position of the light concentrating area 33b corresponds to the optical module 5; for example, the light concentrating area 33b can be located on the upper surface 520 of the second light guide 52, as shown in FIG. 7, or located on the second light guide 52 Near surface 520. In addition, the lens optical axis 41 may pass through the light focusing area 33b, and the lens focal point 42 may be located within the light focusing area 33b; or, the lens optical axis 41 may deviate from the light focusing area 33b, and the lens focal point 42 may be located near the light focusing area 33b. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

The second light emitting unit 32 of the second light source module 3 may be a light emitting diode (LED) or a light emitting diode package structure (LED package structure); for example, the second light emitting unit 32 is a light emitting diode package structure It also includes a plurality of light emitting diode chips 221, two of which are illustrated in FIG. 4. In addition, the second light emitting unit 32 may be disposed on or near the first focus 33a of the second reflection unit 33. The second circuit substrate 31 of the second light source module 3 can be a metal-based printed circuit board (MCPCB), and has a driving control circuit for the second light-emitting unit 32, and the second light-emitting unit 32 can use surface mount technology (SMT ) Is mounted on the second circuit board 31. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

Referring to FIG. 13, the positioning structure 11 of the base 1 may have an inclined surface 110 facing the first light-emitting unit 22, which may define a line passing through the center point of the light source of the first light-emitting unit 22 and the edge of the upper surface of the positioning structure 11 A straight line T, and a predetermined angle θ3 between this straight line and the lens optical axis 41 is less than 70 degrees, so as to avoid blocking the light emitted by the first light-emitting unit 22. In addition, there is a horizontal distance D1 of about 25 mm between the first light emitting unit 22 and the second light emitting unit 32; the first light emitting unit 22 has a first light emitting surface 220, and the second light emitting unit 32 has a second light emitting surface 320. And there is a vertical distance D2 between 0 mm and 10 mm between the first light-emitting surface 220 and the second light-emitting surface 320; there is a vertical distance between the first mounting surface 211 of the first circuit substrate 21 and the board surface 311 of the second circuit substrate 31 The distance D3 is 0 mm to 15 mm. In order to improve the utilization of light, the lens optical axis 41 may pass through the first light-emitting surface 220, or the lens optical axis 41 may pass through the second light-emitting surface 320 or be located near the second light-emitting surface 320, that is, the lens optical axis 41 may pass through the second light-emitting surface 320. The second circuit substrate 31 may be located above the second circuit substrate 31.

Referring to FIG. 14, the second reflecting unit 33 can be slightly inclined upward to make full use of the light emitted by the second light emitting unit 32; furthermore, the second reflecting unit 33 has a second bottom opening 330, The connecting line between the first focal point 33a of the reflecting unit 33 and the lens focal point 42 is located near the second bottom opening 330, and the connecting line between the first focal point 33a of the second reflecting unit 33 and the lens focal point 42 and the lens optical axis 41 sandwich a predetermined The angle θ4 is 0 degrees to 20 degrees.

Referring to FIG. 15, according to the light distribution needs, the reflective surface of the second reflective unit 33 may include a first reflective curved surface 331, a second reflective curved surface 332, and a connection between the first reflective curved surface 331 and the second reflective curved surface 332. The connecting surface 333 between the two, and the first reflective curved surface 331 and the second reflective curved surface 332 are each a curved surface with multiple curvatures. The main feature of this multi-curvature complex surface is that at least one of its vertical or horizontal base lines does not meet the requirements of an elliptic curve, that is, a ² -b ^{2 is} not equal to c ² , where a represents the 1/2 major axis of the ellipsoid , B represents the 1/2 minor axis of the ellipsoid, and c represents the distance from the center point of the ellipsoid to the focal point.

Referring to FIGS. 3 to 6 and in conjunction with FIGS. 16 to 18, the first light guide 51 and the second light guide 52 of the optical module 5 are arranged separately, and the first light guide 51 is substantially horizontal , And the first A part of the light guide 51 is located in the coverage area of the first reflective unit 23; in this embodiment, the upper surface 510 of the first light guide 51 may have reflective or extinction characteristics according to actual needs. The second light guide 52 of the optical module 5 is in a standing state, and the second light guide 52 is located outside the coverage area of the first reflecting unit 23. It should be noted that the second light guide 52 may be in a vertical standing state or an inclined standing state. However, these details are only feasible implementation manners provided by this embodiment, and are not intended to limit the present invention.

In this embodiment, the first light guide 51 is a light reflector, which is adjacent to the second circuit substrate 31 and extends toward the light distributing lens 4, wherein the first light guide 51 has a notch 514; The second light guide 52 is a light guide, which is disposed at the notch 514 of the first light guide 51 and the position corresponds to the second light source module 3. Preferably, the upper surface 510 of the first light guide 51 is substantially flush with the surface (not numbered) of the second circuit substrate 31, and the gap between the first light guide 51 and the second circuit substrate 31 must be less than or equal to 3 mm .

In an embodiment not shown, in order to further reduce the size of the device, the first light guide 51 and the second light guide 52 may be integrated into one body, that is, the first light guide 51 and the second light guide 52 There is at least one connection. In addition, a part of the first light guide 51 can be arranged above the second circuit substrate 31 so that there is no gap between the first light guide 51 and the second circuit substrate 31.

Furthermore, the material of the second light guide 52 can be PMMA or silicone rubber, but is not limited thereto. The shape and size of the notch 514 of the second light guide 52 and the first light guide 51 roughly match; as shown in FIG. 16, the notch 514 of the first light guide 51 is exemplified as an arc-shaped notch and the second light guide 51 52 is illustrated as an arc shape, but is not limited to this. It is worth noting that the upper surface 510 of the first light guide 51 is higher than the upper surface 520 of the second light guide 52, and the vertical projection of the upper surface 510 of the first light guide 51 is the same as that of the second light guide 52. The upper surface 520 partially overlaps; and the upper surface 520 of the second light guide 52 can be a flat or inclined surface, and the upper surface 520 of the second light guide 52 is inclined at a predetermined angle θ5 relative to the lens optical axis 41, which can be 0 Degree to 10 degrees, preferably 0 degrees to 7.5 degrees, as shown in FIG.

As shown in FIG. 18, according to the light distribution needs, a reflective layer 53 can be formed on the upper surface 520 of the second light guide 52, which can be formed of a material with high reflectivity (such as aluminum, silver, etc.); thereby, it can prevent The light projected by a light source module 2 penetrates the second light guide 52 from the upper surface 520, and can increase the light effect of the low beam lamp below the cut-off line. In addition, as shown in FIG. 3, the second light guide 52 has a light incident surface 521 and a light exit surface 522 opposite to the light incident surface 521, and the shortest distance between the second light emitting unit 32 and the light exit surface 522 is 10 mm to 50 mm .

Referring to FIGS. 3 to 7, the second light source module 3 may further include a light shielding member 34, which is disposed between the second reflecting unit 33 and the second light guide member 52, and the light shielding member 34 has a The opening 340 through which the effective light emitted by the two light-emitting units 32 passes. Furthermore, the light-shielding member 34 may be a light-shielding plate and stand in a vertical state, but is not limited thereto. In this way, it is possible to prevent the light projected by the second light source module 3 from being emitted outside according to the planned light path, causing stray light to be generated outside the required illumination pattern. In this context, the term "effective light" refers to light that can contribute to the desired illumination light type (or illumination pattern).

Referring to FIG. 16, the optical design of the first light guide 51 and the second light guide 52 of the optical module 5 will be described below. This optical design can produce a low beam cut-off line that meets the ECE R123 specification for vehicle lights. . The first light guide 51 has two outer optical regions 51a and a central optical region 51b located between the two outer optical regions 51a; and the upper surface 510 of the first light guide 51 includes a first reflection plane 511, A second reflecting plane 512 and a reflecting inclined plane 513 connected between the first reflecting plane 511 and the second reflecting plane 512, wherein the first reflecting plane 511 and the second reflecting plane 512 are respectively located in the two outer optical regions 51a, In addition, the position of the first reflective plane 511 is higher than the second reflective plane 512, and the reflective inclined surface 513 is located in the central optical region 51b.

In addition, the second light guide 52 also has two outer optical regions 52a and a central optical region 52b located between the two outer optical regions 52a; and the upper surface 520 of the second light guide 52 includes two first The optical plane 523 and a stepped convex arranged between the two first optical planes 523 The two first optical planes 523 are respectively located in the two outer optical regions 52a, and the two first optical planes 523 are substantially flush, and the stepped convex structure 524 is located in the central optical region 52b.

It is worth noting that the stepped convex structure 524 includes a first optical inclined surface 5241, a second optical inclined surface 5242 and a second optical plane 5243, as shown in FIG. 1; wherein the first optical inclined surface 5241 is connected to the two One of the first optical planes 523, the second optical plane 5242 is connected to the other of the two first optical planes 523, the second optical plane 5243 is connected between the first optical plane 5241 and the second optical plane 5242, and the second The position of the optical plane 5243 is higher than the first optical plane 523. Furthermore, the first optical inclined surface 5241 and the second optical inclined surface 5242 are inclined in different directions, the area of the second optical inclined surface 5242 is smaller than the area of the first optical inclined surface 5241, and the slope (or inclination angle) of the second optical inclined surface 5242 It is greater than the slope (or inclination angle) of the first optical slope 5241. In addition, the light projected by the second optical inclined surface 5242 is close to the vertical center line of the low beam lamp type.

Referring to FIGS. 7-9, when in use, one of the light rays L1 emitted by the first light-emitting unit 22 can be reflected by the first reflecting unit 23 to generate a reflected light L11 that is projected to the upper surface of the first light guide 51 510, and the primary reflected light L11 can be reflected by the upper surface 510 of the first light guide 51 to generate a secondary reflected light L12 projected from above the lens optical axis 41 to the light distributing lens 4, and finally a low-beam light type at least Part. In addition, another light L2 emitted by the first light-emitting unit 22 can be reflected by the first reflecting unit 23 to generate a reflected light L21 that is projected to the upper surface 520 of the second light guide 52, and the once reflected light L21 can be again The upper surface 520 of the second light guide 52 is reflected to generate a secondary reflection light L22 which is projected from above the lens optical axis 41 to the light distribution lens 4, and finally forms at least a part of the low beam light type. In addition, another light L3 emitted by the first light-emitting unit 22 can be reflected by the first reflecting unit 23 to generate a reflected light L31 to pass through the hollow area between the second light guide 52 and the light distributing lens 4, and then from It emits from below the light distributing lens 4 and finally forms at least a part of the low beam light type.

In use, as shown in FIG. 9, one of the light rays L4 emitted by the second light-emitting unit 32, It can be reflected by the second reflecting unit 33 to generate a primary reflected light L41, and the primary reflected light L41 is projected to the light incident surface 521 of the second light guide 52 through the opening 340 of the shading member 34 to generate a primary refracted light L42 and project to the first The upper surface 520 of the second light guide 52; then, the primary refracted light L42 can be reflected by the upper surface 520 of the second light guide 52 to generate a secondary reflected light L43 that is projected to the light distribution lens 4 from below the lens optical axis 41 , And finally form at least part of the high beam light type. Another light L5 emitted by the second light-emitting unit 32 can be reflected by the second reflecting unit 33 to generate a primary reflected light L51, and the primary reflected light L51 is projected to the entrance of the second light guide 52 through the opening 340 of the shading member 34 The light surface 521 generates a primary refracted light L52 and is projected to the light exit surface 522 of the second light guide 52; then, the primary refraction light L52 generates a secondary refraction light L53 through the light exit surface 522 of the second light guide 52 and is projected to the light distribution The lens 4 finally forms at least a part of the high beam light type.

[Second Embodiment]

Referring to Figure 19 and Figures 1 to 6, the second embodiment of the present invention provides a high-efficiency light projection device Z. The difference from the first embodiment lies in the optical design of the optical module 5, which can produce The cut-off line of the low beam light in accordance with the ECE R112 regulations of the car lights.

Furthermore, the upper surface 520 of the second light guide 52 of the optical module 5 includes a first optical plane 525, a second optical plane 526, and a connection between the first optical plane 525 and the second optical plane 526 The first optical plane 525 and the second optical plane 526 are respectively located in the two outer optical regions 52a, and the position of the first optical plane 525 is higher than the second optical plane 526, and the optical bevel 527 is located in the central optical area. In the area 52b; thereby, the high-efficiency light projection device Z can produce an asymmetric light pattern. In other embodiments, in order to generate a symmetrical light pattern, the upper surface 520 of the second light guide 52 may only include the first optical plane 525 and the second optical plane 526 that are flush with each other.

[Third Embodiment]

Referring to Fig. 20 and shown in Fig. 1 to Fig. 6, the third embodiment of the present invention provides an efficient The difference between the first light source module 2 and the second circuit board 31 of the second light source module 3 is that the functions of the first circuit board 21 of the first light source module 2 and the second circuit board 31 of the second light source module 3 are integrated together. One board to shorten the heat transfer path and reduce the size of the device.

Furthermore, the first circuit substrate 21 of the first light source module 2 has a first mounting surface 211 and a second mounting surface 212 opposite to the first mounting surface 211, and the first light emitting unit of the first light source module 2 22 is disposed on the first mounting surface 211, and the second light-emitting unit 32 of the second light source module 3 is disposed on the second mounting surface 212 and is offset from the first light-emitting unit 22.

In this embodiment, the second light source module 3 does not include the second circuit substrate 31; the first circuit substrate 21 of the first light source module 2 has multiple circuit layers (not shown), of which the upper circuit layer can serve as the first The drive control circuit of the light-emitting unit 22, the lower circuit layer can be used as the drive control circuit of the second light-emitting unit 32, the middle circuit layer can be used as the internal interconnection circuit; and the middle circuit layer can also provide a heat conduction path, and the thickness of the middle circuit layer can be Greater than the thickness of the upper and lower circuit layers. In this way, the size of the device can be greatly reduced without affecting the light intensity at all.

[Beneficial effects of the embodiment]

One of the beneficial effects of the present invention is that the high-efficiency light projection device provided by the present invention can be arranged between the base and the light distribution lens through the "optical module, and includes a first light guide near the base And a second light guide member far from the base, wherein the first light guide member is made of opaque material and the second light guide member is made of light transmitting material, and the upper surface of the first light guide member and the second light guide member The “upper surface is located near the optical axis of the lens” technical solution to make full use of the light source to greatly increase the light intensity of the low beam and high beam on the premise of meeting the requirements of miniaturization; in addition, the heat dissipation area of the device can be greatly increased , Thereby improving the heat dissipation efficiency, and can reduce the use of moving parts.

The content disclosed above is only a preferred and feasible embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

Z: High efficiency light projection device

1: base

2: The first light source module

4: Light distribution lens

5: Optical module

Claims (20)

A high-efficiency light projection device, comprising: a base; a first light source module arranged on the base, wherein the first light source module includes a first light-emitting unit and a first reflecting unit Used to reflect the light emitted by the first light-emitting unit; a second light source module, which is arranged on the base and corresponds to the first light source module, wherein the second light source module includes a The second light-emitting unit and a second reflecting unit are used to reflect the light emitted by the second light-emitting unit; a light distribution lens whose position corresponds to the first light source module and the second light source module and has A lens optical axis; and an optical module, which is disposed between the base and the light distributing lens, for directing the light reflected by the first reflecting unit and the second reflecting unit to the A light distribution lens; wherein the optical module includes a first light guide member close to the base and a second light guide member far away from the base, and the first light guide member is made of opaque material And the second light guide is made of light-transmitting material, and an upper surface of the first light guide and an upper surface of the second light guide are both located near the optical axis of the lens. According to the high-efficiency light projection device described in claim 1, wherein the upper surface of the first light guide is higher than the upper surface of the second light guide, and the first The vertical projection of the upper surface of the light guide partially overlaps the upper surface of the second light guide. The high-efficiency light projection device according to the second item of the scope of patent application, wherein the upper surface of the second light guide member is inclined at a predetermined angle with respect to the optical axis of the lens The degree is between 0 degrees and 7.5 degrees. According to the high-efficiency light projection device described in item 3 of the scope of patent application, the upper surface of the second light guide member has a light reflecting layer. According to the high-efficiency light projection device described in claim 1, wherein the base has a bearing surface, the first light source module further includes a first circuit substrate, and the first circuit substrate is disposed on On the carrying surface, the first light-emitting unit is electrically connected to the first circuit substrate, the second light source module further includes a second circuit substrate, and the second circuit substrate is disposed on the carrying surface , And staggered from the position of the first circuit substrate, and the second light-emitting unit is electrically connected to the second circuit substrate. The high-efficiency light projection device according to the fifth item of the scope of patent application, wherein the second circuit board is located closer to the optical module than the first circuit board, and the base has a slave The positioning structure formed by the extension of the carrying surface, the second circuit substrate has a central area where the second light-emitting unit is disposed, and at least one peripheral area on one side of the central area, and the peripheral areas are fixedly connected于The positioning structure. According to the high-efficiency light projection device described in item 6 of the scope of patent application, wherein a vertical distance between a board surface of the second circuit substrate and a first mounting surface of the first circuit substrate is 0 to 15mm. According to the high-efficiency light projection device described in item 6 of the scope of patent application, wherein a gap between the second circuit substrate and the first light guide is less than or equal to 3 mm, and the position of the second light guide corresponds to The second light source module is standing state. According to the high-efficiency light projection device described in item 7 of the scope of patent application, the first light guide is in a horizontal state. The high-efficiency light projection device according to the fifth item of the scope of patent application, wherein the optical axis of the lens passes through the second circuit substrate or is located above the second circuit substrate; the base includes a plurality of heat dissipation structures , Which has a sheet shape and is distributed at intervals around the first circuit substrate and the second circuit substrate. The high-efficiency light projection device according to the first item of the scope of patent application, wherein the second light source module further includes a light shielding member disposed between the second reflecting unit and the second light guide member And the shading member only allows the effective light emitted by the second light-emitting unit to pass. The high-efficiency light projection device according to the first item of the scope of patent application, wherein the first light-emitting unit includes a plurality of light-emitting elements arranged in a predetermined direction, the predetermined direction and the lens optical axis at a predetermined angle It is 70 degrees to 110 degrees. According to the high-efficiency light projection device described in claim 1, wherein the first reflection unit is a reflection cover and has a first bottom opening, the first reflection unit is arranged inclined upward, and the A reflecting unit has a first focal point and a second focal point corresponding to the first focal point, wherein the line connecting the first focal point and the second focal point of the first reflecting unit is located at the first focal point. The vicinity of the bottom opening and a predetermined angle with the optical axis of the lens is greater than 0 degrees and less than 7.5 degrees. According to the high-efficiency light projection device described in claim 1, wherein, the second reflection unit is a reflection cover and has a second bottom opening, and the second reflection unit has a first focus, wherein, The line connecting the first focal point of the first reflecting unit and a lens focal point of the light distributing lens is located near the second bottom opening, and a predetermined angle with the optical axis of the lens is greater than 0 degree And less than 20 degrees. According to the high-efficiency light projection device described in claim 1, wherein the light distribution lens has a lens focal point whose position corresponds to the upper surface of the second light guide, and the second reflection unit There is a reflective surface, and the reflective surface defines at least two optical axes passing through the focal point of the lens. The high-efficiency light projection device according to the 15th patent application, wherein the reflecting surface of the second reflecting unit includes a first reflecting curved surface, a second reflecting curved surface, and a second reflecting surface connected to the first reflecting surface. A connecting surface between the curved surface and the second reflective curved surface, and the radius of curvature of the first reflective curved surface is different from the radius of curvature of the second reflective curved surface. According to the high-efficiency light projection device described in claim 1, wherein, the first light guide has two outer optical regions and a central optical region located between the two outer optical regions, and The upper surface of the first light guide includes a first reflective plane, a second reflective plane, and a reflective inclined plane connected between the first reflective plane and the second reflective plane. The first reflective plane is connected to the The second reflection planes are respectively located in the two outer optical regions, and the position of the first reflection plane is higher than the second reflection plane, and the reflective inclined plane is located in the central optical region. According to the high-efficiency light projection device described in claim 1, wherein the second light guide has two outer optical regions and a central optical region located between the two outer optical regions, and The upper surface of the second light guide includes two first optical planes and a stepped convex structure arranged between the two first optical planes, and the two first optical planes are respectively located in two In the outer optical area, and the two first optical planes are coplanar, and the stepped convex structure is located in the central optical area. The high-efficiency light projection device according to item 18 of the scope of patent application, wherein the stepped convex structure includes a first optical inclined surface, a second optical inclined surface and a second optical plane, the first optical inclined surface Is connected to one of the two first optical planes, the second optical bevel is connected to the other of the two first optical planes, and the second optical plane is connected to the first optical bevel and the Between the second optical inclined surfaces, and the position of the second optical plane is higher than the first optical plane, wherein the area of the second optical inclined surface is smaller than the area of the first optical inclined surface, and the second optical inclined surface The slope is greater than the slope of the first optical slope. A high-efficiency light projection device, comprising: a base; a circuit substrate, which is arranged on the base and has a first mounting surface and a second mounting surface opposite to the first mounting surface; A first light source module, which includes a first light emitting unit and a first reflecting unit arranged on the first mounting surface to reflect the light emitted by the first light emitting unit; a second light source module , Which includes a second light emitting unit disposed on the second mounting surface and a second reflecting unit for reflecting the light emitted by the second light emitting unit A light distribution lens, the position of which corresponds to the first light source module and the second light source module, and has a lens optical axis; and an optical module, which is disposed on the base and the Between the light distribution lenses, the light reflected by the first reflection unit and the second reflection unit is directed to the light distribution lens; wherein, the optical module includes a first A light guide and a second light guide away from the base, the first light guide is made of opaque material, the second light guide is made of light transparent material, and the first light guide An upper surface of the element and an upper surface of the second light guide element are both located near the optical axis of the lens.

Images